High-Pressure Behavior of Ferromagnesite (Mg0.81Fe0.19)CO3 by Synchrotron X-Ray Diffraction and Raman Spectroscopy up to 53 GPa

Ferromagnesite (Mg, Fe)CO3 with 20 mol 0 ′ = 4.2(1). Combining the dνi/dP and the K0, the mode Grüneisen parameters of each vibrational mode (T, L, ν4 and ν1) were calculated. The effects of iron concentration on the Mg1−xFexCO3 system related to high-pressure compressibility and vibrational properties are discussed. These results expand the knowledge of the physical properties of carbonates and provide insights to the potential deep carbon host.